JP4667844B2 - Power supply device for sliding door - Google Patents

Description

  The present invention relates to a sliding door power supply device for constantly supplying power and transmitting signals to a device in a sliding door from a vehicle body side of an automobile.

  Equipment such as a power window motor, a switch, and a speaker is incorporated in a sliding door used for a one-box car, a wagon car, and the like. In order to supply power to these devices from the vehicle body side, it is necessary to wire an electric wire (wire harness) from the vehicle body side to the slide door side and to allow the electric wire to follow the opening and closing of the slide door.

  Conventionally, as this type of sliding door power supply device, a method is known in which an electric wire winding unit is installed on the vehicle body side, and the extra length of the electric wire accompanying opening and closing of the sliding door is absorbed by winding the electric wire ( Patent Document 1).

  As another type of power supply device for a sliding door, a flexible tube containing a wire harness is routed between a predetermined position on the vehicle body side and the sliding door with a bending margin, and one of the flexible tubes is arranged. The other end is fixed to the slide door and the vicinity of the other end is supported by a metal fitting attached to the vehicle body so as to be able to swing in the lateral direction (see Patent Document 2).

Japanese Patent Laid-Open No. 11-93514 JP 2002-79892 A

  However, since the power supply device for a sliding door described in Patent Document 1 has a structure in which the electric wire is drawn out from the winding unit while being bare, the electric wire is rubbed against other members (such as a slide rail) and is easily damaged. Moreover, since the winding unit needs to draw out or wind up an electric wire having the same length as the opening / closing stroke of the slide door, there is a problem that the apparatus becomes large.

  Moreover, although the power supply apparatus for slide doors described in Patent Document 2 is less likely to be damaged because the wire harness is housed in the flexible tube, the flexible tube with the wire harness only absorbs the opening / closing stroke of the slide door. In order to route a flexible tube with such a long wire harness with a margin for bending, not only a large space is required, but also the flexible tube is slackened and connected with other members. Contact may cause abnormal noise or damage.

  An object of the present invention is that the wire harness extending from the vehicle body side to the slide door side and the flexible tube that accommodates the wire harness are less likely to be damaged, can be downsized as a whole, and the flexible tube can be bent and moved in a relatively small space. An object of the present invention is to provide a power supply device for a sliding door that can be used.

The power supply device for a sliding door according to the present invention is
A surplus length absorption unit fixed to the vehicle body side, a door side fixing unit fixed to the slide door side, a flexible pipe extending from the surplus length absorption unit to the door side fixing unit, the surplus length absorption unit, and flexibility A wire harness that passes from the vehicle body side to the sliding door side through the pipe and door side fixing unit, and
The surplus length absorption unit applies a rotational force in a direction in which the flexible tube is wound up to the case having a flexible tube entrance and exit, a rotating drum that winds up the flexible tube in the case, and the rotating drum. A torsion spring, and an end of the flexible tube on the vehicle body side is fixed to the rotating drum, and a portion of the wire harness on the vehicle body side is fixed to the rotating drum near the end of the flexible tube, It is wound spirally inside the rotating drum, the spiral inner periphery is fixed to the center of the case, and is drawn out of the case from there.
The door-side fixing unit is configured to grip an end portion of the flexible tube on the slide door side, and a portion of the wire harness on the slide door side is pulled out from the end portion of the flexible tube into the slide door. And
The surplus length absorption unit is fixed to the vehicle body so as to be located in the middle of the range of movement of the door side fixing unit by opening and closing of the slide door, and the flexible tube extending from the surplus length absorption unit to the door side fixing unit has the rotation Tension is applied by the rotational force of the drum ,
The wire harness is composed of one or a plurality of flat cables, and the flexible tube is composed of a corrugated tube having a vertically long cross section for accommodating the flat cable with its width direction facing up and down .
It is characterized by this.

  As the torsion spring of the surplus length absorption unit, a coil spring or a spiral spring can be used. However, the use of the coil spring is preferable in terms of miniaturization and ease of design.

The corrugated tube section vertically long, it is more preferable that ribs extending in the longitudinal direction on at least one of the upper and lower surfaces are formed.

  In the sliding door power supply device of the present invention, it is preferable that a guide for restricting the bending radius of the flexible tube to an allowable range is provided at the entrance and exit of the flexible tube of the surplus length absorption unit. Further, it is preferable that a reinforcing wall for preventing the guide from bending is provided on the back side of the guide.

  In the sliding door power supply device of the present invention, the door-side fixing unit is fixed to the sliding door so that the flexible tube goes forward or backward of the sliding door, and the flexible tube is located near the outlet of the flexible tube. It is preferable that a guide is provided for restricting the bending radius of the steel sheet within an allowable range.

  In the sliding door power supply device of the present invention, the door-side fixing unit includes a fixing member fixed to the sliding door and a tube end clamp attached to the fixing member so as to be able to swing in the lateral direction. The member may be provided with a swing regulating portion for regulating the swing range of the tube end clamp.

  In the sliding door power supply device of the present invention, the extra length absorbing unit case includes a lower case, an upper case, and a sub-cover that fixes the inner periphery of the spirally wound wire harness to the center of the case. The lower case is formed with a main shaft to be inserted into the hollow shaft portion of the rotating drum, and the upper case is formed with a central tube portion located on the outer periphery of the hollow shaft portion of the rotating drum. The sub cover is attached so as not to rotate, and the torsion spring of the extra length absorption unit is constituted by a coil spring, and this coil spring is twisted so as to apply a rotational force in the direction of winding the flexible tube around the rotating drum. In the state, it is preferably incorporated between the lower case and the rotating drum.

  In the sliding door power supply device of the present invention, the extra length absorbing unit case includes a lower case, an upper case, and a sub-cover that fixes the inner periphery of the spirally wound wire harness to the center of the case. The lower case is formed with a main shaft to be inserted into the hollow shaft portion of the rotary drum, and the sub cover is attached to the main shaft so as not to rotate, and the torsion spring of the extra length absorption unit is configured by a coil spring. More preferably, the coil spring is incorporated between the lower case and the rotating drum in a state where the coil spring is twisted so as to apply a rotating force in the direction of winding the flexible tube around the rotating drum.

  In the sliding door power supply device of the present invention, it is preferable that a stopper for restricting the rotation angle of the rotating drum is provided on the lower surface of the bottom plate portion of the rotating drum and the upper surface of the bottom plate portion of the lower case facing the rotating drum. .

  Further, in the sliding door power supply device of the present invention, a notch portion is provided in the bottom portion of the flexible tube entrance and exit of the case so that foreign matter such as pebbles does not collect, and the case and the rotating drum are in the case. A clearance larger than the size of the foreign matter that can enter is provided, and the bottom of the lower case is inclined so that foreign matter that has entered the case is discharged and a hole is formed, and the coil spring housing portion of the lower case It is preferable that a rib is formed so that the coil spring is in a state of floating from the bottom of the lower case.

  Moreover, it is preferable that the power supply device for the sliding door of the present invention is provided with a projecting piece that regulates the vertical movement of the flexible tube wound around the rotating drum from the upper edge of the rotating drum toward the outside. .

  Further, in the sliding door power supply device of the present invention, the sub cover includes a fitting portion that is fitted to the upper end of the main shaft of the lower case, and a guide passage that guides the flat cable to the outside of the case across the rotating drum. The outer end of the guide passage is preferably fixed to the outer peripheral portion of the lower case. Further, in this case, it is preferable that the upper case is formed with a grooved lid portion into which the upper surface portion (including the guide passage) of the sub cover is fitted.

  In the sliding door power supply device of the present invention, it is preferable that an opening is formed in a portion of the bottom plate portion of the rotating drum where the end of the coil spring comes into contact for easy assembly.

  In the sliding door power supply device of the present invention, the rotating drum, the lower case, and the coil spring are assembled with the upper surface of the rotation angle restricting stopper provided on the lower case and the rotation angle restricting provided on the rotating drum. Dimension (Q) from the upper end of the coil spring to the upper end surface of the spring housing portion of the rotating drum when the upper end of the coil spring is positioned above the lower end edge of the spring housing portion of the rotating drum Is preferably larger than the dimension (R) from the upper end of the coil spring to the lower end edge of the spring accommodating portion of the rotary drum.

  In the sliding door power supply device of the present invention, the rotating drum, the lower case, and the coil spring are a combination of an untwisted coil spring and a lower case so that the two are not relatively rotated, and an untwisted coil spring. When the rotating drum and the rotating drum are combined so that they do not rotate relatively, the lower surface of the rotation angle regulating stopper provided on the rotating drum comes into contact with the upper surface of the rotation angle regulating stopper provided on the lower case, From this state, when the rotating drum is rotated by a predetermined angle in the direction of applying a twist to the coil spring and pushed into the lower case, the stopper on the lower case and the stopper on the rotating drum are engaged with each other. This is preferable for easy assembly.

  In the sliding door power supply device of the present invention, the flexible tube extending from the vehicle body side to the sliding door side is wound around the extra length absorption unit together with the wire harness, and the tension is always applied by the winding force. Since it is in the state, the trajectory of the bending movement of the flexible tube by opening and closing the slide door can be made almost constant. For this reason, there is little possibility that the flexible tube will come into contact with other members even in a narrow space, and the generation and damage of abnormal noise can be prevented.

  The surplus length absorption unit is a method of winding a flexible tube, but is fixed to the vehicle body so as to be positioned in the middle of the range of movement of the door-side fixing unit by opening and closing the sliding door. Only the difference between when the extra length is the maximum and when the extra length is minimum needs to be taken up, and the take-up length of the flexible tube can be shortened, so an increase in size can be avoided. In particular, if the wire harness is composed of one or a plurality of flat cables and the flexible tube is composed of a corrugated tube having a vertically long cross section, the winding outer diameter of the flexible tube can be reduced. It can be sufficiently downsized. Further, if a rib extending in the longitudinal direction is formed on at least one of the upper surface and the lower surface of the corrugated tube having a vertically long cross section, the corrugated tube can be reduced in elongation and the flexibility is not impaired.

  In addition, if a guide that regulates the bending radius of the flexible tube is provided at the flexible tube entrance / exit of the surplus length absorption unit, the bending shape of the flexible tube is stable when the sliding door is fully closed and fully opened. The trajectory of the bending movement of the flexible tube can be made constant with higher accuracy.

  In addition, the door side fixing unit may be fixed to the sliding door so that the flexible tube protrudes forward or backward of the sliding door, and a guide for regulating the bending radius of the flexible tube may be provided in the door side fixing unit. It is effective to make the trajectory of the bending movement of the flexible tube constant with higher accuracy.

  Further, when the door side fixing unit is constituted by a fixing member fixed to the slide door and a tube end clamp capable of swinging in the lateral direction, the flexible tube is not tightly bent when the slide door is fully opened or fully closed. Therefore, it becomes difficult to bend the flexible tube. Further, if the fixed member is provided with a swing regulating portion that regulates the swing range of the clamp, the bent shape of the flexible tube is stable when the slide door is fully closed and fully opened, and the flexible tube is bent and moved. The trajectory can be made constant with higher accuracy.

  The extra length absorption unit case consists of a lower case, an upper case, and a sub-cover that fixes the inner periphery of the spiral wire harness to the center of the case, and is inserted into the hollow shaft of the rotating drum in the lower case. When the main shaft is provided, the sub cover is attached to the main shaft, and a coil spring is incorporated between the lower case and the rotating drum, the assembly of the extra length absorbing unit is simple. In addition, when the coil spring is used, it is possible to suppress an increase in the diameter of the spring as compared with the case where a spiral spring is used, and it is possible to downsize the entire extra length absorption unit. Moreover, the vertical strength of the case can be increased by providing the main shaft.

  In addition, if a stopper that regulates the rotation angle of the rotating drum is provided on the lower surface of the bottom plate portion of the rotating drum and the upper surface of the bottom plate portion of the lower case facing the rotating drum, for example, the positional relationship between these stoppers In addition to setting the tension to the flexible tube before it fully opens, the range where the tension is applied can be freely set for each vehicle model, and the flexible tube is loosened when the sliding door is fully opened. Can be less.

Embodiment 1 FIGS. 1 to 10 show an embodiment of the present invention. FIG. 1 shows a schematic configuration of a power supply device for a sliding door. In the figure, 10 is a vehicle body, 12 is a sliding door, 14 is a surplus length absorption unit fixed to the car body 10, 16 is a door side fixing unit fixed to the slide door 12, and 18 is a door side fixing from the surplus length absorption unit 14. A flexible tube extending over the unit 16, 20 is a flat cable (flat wire harness) extending from the vehicle body 10 side to the slide door 12 side through the extra length absorbing unit 14, the flexible tube 18, the door side fixing unit 16, and 22 is flat A connector 24 is attached to the end of the cable 20 on the vehicle body 10 side, and 24 is a connector attached to the end of the flat cable 20 on the slide door 12 side.

  FIG. 2 shows the state of the sliding door power supply device when the sliding door 12 is fully closed and fully opened. The surplus length absorbing unit 14 is fixed to the vehicle body 10 so as to be positioned in the middle of the range of movement in the front-rear direction of the door-side fixing unit 16 by opening and closing the slide door 12. FIG. 3 shows the trajectory of the bending movement of the flexible tube 18 from the fully closed position to the fully open position and from the fully open position to the fully closed position.

  The door-side fixing unit 16 holds the end of the flexible tube 18 on the slide door 12 side. In this embodiment, the door-side fixing unit 16 is fixed to the slide door 12 so that the flexible tube 18 goes out to the rear of the slide door. The door-side fixing unit 16 has a guide 26 that regulates the bending radius of the flexible tube 18. This guide 26 prevents the flexible tube 18 from being bent smaller than the allowable bending radius when the sliding door 12 is fully opened. A portion of the flat cable 20 on the slide door side is drawn from the end of the flexible tube 18 into the slide door 12. The flat cable 20 is fixed to the door-side fixing unit 16 (or a part of the slide door 12) near the end of the flexible tube 18, and is not drawn into the flexible tube 18.

  4 to 10 show the configuration of the surplus length absorption unit 14. The surplus length absorption unit 14 includes a case 30 having an inlet / outlet 28 for the flexible tube 18, a rotating drum 32 for winding the flexible tube 18 in the case 30, and a direction for winding the flexible tube 18 around the rotating drum 32. And a coil spring 34 for imparting a rotational force. The flexible tube 18 is a corrugated tube having a vertically long cross section, and the flat cable 20 (not shown in FIGS. 4 to 6) is inserted into the flexible tube 18 with its width direction directed in the vertical direction. The flexible tube 18 is split in the longitudinal direction to facilitate the insertion of the flat cable 20.

  As shown in FIG. 8, the corrugated tube 18 having a vertically long cross section preferably has ribs 33 extending in the longitudinal direction on the upper and lower surfaces thereof. If such a rib 33 is formed, since the elongation when the corrugated tube 18 is tensioned can be reduced, the winding length of the surplus length absorption unit 14 can be shortened, and the surplus length absorption unit 14 can be further increased. It becomes possible to reduce the size. Further, since the rib 33 is formed on the upper and lower surfaces of the corrugated tube 18, the flexibility of the corrugated tube 18 is not impaired.

  As shown in FIGS. 6 and 7, the rotary drum 32 is integrally formed with a flange portion 36, a disk-like bottom plate portion 38, and a hollow shaft portion 40. A fixing portion 41 of the flexible tube 18 is formed in a part of the flange portion 36 in the circumferential direction. The case 30 includes a lower case 30A and an upper case 30B. The lower case 30A has a main shaft 42 inserted into the hollow shaft portion 40 of the rotating drum 32, and the upper case 30B has a hollow shaft portion of the rotating drum 32. A central cylindrical portion 44 located on the outer periphery of 40 is formed. The rotary drum 32 is rotatable about the main shaft 42 of the lower case 30A.

  The end of the flexible tube 18 on the vehicle body side is fixed to the rotary drum 32 by a fixing component 46 (see FIGS. 6 and 10). The fixed component 46 is configured to sandwich the end portion of the flexible tube 18 together with the fixed portion 41 of the rotating drum 32. The flat cable 20 in the case 30 enters the inside of the rotating drum 32 near the end of the flexible tube 18 and is fixed to the rotating drum 32 by the fixing component 46 there. The flat cable 20 inside the rotary drum 32 is spirally wound on the bottom plate portion 38, and the inner peripheral portion thereof is a sub cover 48 (see FIGS. 6, 7, and 10) on the central cylindrical portion 44 of the upper case 30B. It is fixed by. The flat cable 20 fixed to the central tube portion 44 is drawn out of the case 30 from there through the guide passage 49 of the sub cover 48. The upper case 30B is integrally formed with a grooved lid portion 50 into which the upper surface portion (including the guide passage 49) of the sub cover 48 is fitted.

  As shown in FIG. 7, the coil spring 34 is incorporated between the bottom plate portion 38 of the rotating drum 32 and the lower case 30 </ b> A, and is screwed so as to apply a rotating force in the direction of winding the flexible tube 18 around the rotating drum 32. In this state, one end is fixed to the lower case 30 </ b> A and the other end is fixed to the rotating drum 32. As a result, tension is applied to the flexible tube 18 extending from the surplus length absorption unit 14 to the door-side fixing unit 16 by the rotational force of the rotary drum 32.

  Further, on both sides of the flexible tube inlet / outlet 28 of the case 30, trumpet guides 52 for regulating the bending radius of the flexible tube 18 are formed. As shown in FIG. 9, a reinforcing wall 53 that prevents the guide 52 from bending is provided on the back side of the guide 52. This is due to the following reason. When the flexible tube 18 is pulled out from the surplus length absorption unit 14 by the opening / closing operation of the slide door, the guide 52 receives a load by pressing the flexible tube 18. This load becomes maximum when the sliding door is fully closed and fully opened. The guide 52 tends to bend in the direction of the arrow P when it receives a load. However, if the reinforcing wall 53 is provided as described above, the guide 52 can be prevented from being bent. Therefore, the shape of the guide 52 can be maintained with high reliability, and as a result, the reliability of the sliding door power supply device can be improved.

  The above is the configuration of the sliding door power supply device of this embodiment. Next, the operation of the sliding door power supply apparatus will be described. Since the rotary drum 32 is given a rotational force in the direction of winding the flexible tube 18 by the coil spring 34, the flexible tube 18 is always tensioned. FIGS. 10A and 10B show the internal state of the surplus length absorption unit 14. FIG. 10A shows the case where the slide door 12 is fully closed, and FIG. 10B shows the case where the slide door 12 is fully open. In the case of this embodiment, as shown in FIG. 2, the path of the flexible tube 18 from the flexible tube inlet / outlet 28 of the surplus length absorption unit 14 to the door-side fixing unit 16 is fully closed. It is slightly longer when fully open than when. That is, the extra length of the flexible tube 18 is large when the slide door 12 is fully closed, and is small when the slide door 12 is fully open. For this reason, the winding length (extra length) of the flexible tube 18 by the rotating drum 32 becomes longer as shown in FIG. 10A when the slide door 12 is fully closed, and when the slide door 12 is fully opened. It becomes short like (B). Further, the flat cable 20 housed in a spiral shape inside the rotating drum 32 spreads as shown in (A) when the rotating drum 32 rotates in the direction of winding the flexible tube 18, and the direction in which the flexible tube 18 is fed out. When it is rotated, it is tightened as shown in (B).

  In this way, the surplus length absorption unit 14 can take up and feed out the flexible tube 18. The length of the rotary drum 32 that winds up the flexible tube 18 may be the difference between when the extra length is the maximum and when the extra length is the minimum, so that the length of winding the flexible tube is small. Therefore, the length for winding the flexible tube can be less than one rotation of the rotating drum as shown in FIG. 10, and the enlargement of the extra length absorption unit 14 can be avoided.

In addition, the flexible tube 18 is under tension, the flexible tube 18 has a certain degree of bending rigidity, and the flexible tube 18 is connected to the guide 52 and the door of the entrance / exit 18 of the extra length absorption unit 14. Since the bending radius is regulated by the guide 26 of the side fixing unit 16, the bending of the flexible tube 18 from the fully-closed state to the fully-opened state and from the fully-opened state to the fully-closed state as shown in FIG. The trajectory of movement is kept almost constant. Therefore, there is little possibility that the flexible tube interferes with other members even in a narrow space, and the generation and damage of abnormal noise can be prevented.
The extra length absorbing unit 14 is installed under the step of the vehicle body. However, since the case 30 has the main shaft 42 and the strength in the vertical direction is high, it is safe even if a load is applied through the step. It is.

  Next, a preferred detailed structure of the surplus length absorption unit 14 will be described. FIG. 11 shows the opposing surfaces of the lower case 30 </ b> A of the extra length absorption unit 14 and the rotating drum 32. Stoppers 72 and 74 for restricting the rotation angle of the rotating drum 32 are formed on the lower surface of the bottom plate portion 38 of the rotating drum 32 and the upper surface of the bottom plate portion 70 of the lower case 30 </ b> A facing the rotating drum 32. The stopper 72 on the rotary drum 32 side and the stopper 74 on the lower case 30A side are formed so as to abut against each other at a desired maximum winding position (minimum feeding position) and minimum winding position (maximum feeding position) of the flexible tube 18. Is done. As shown in FIG. 12, the rotation angle A of the rotary drum 32 is regulated by the positions where these stoppers 72 and 74 are formed, and the extra length absorption length B of the flexible tube 18 can be determined. The positional relationship between the stoppers 72 and 74 is preferably set so that tension is applied to the flexible tube (greater than the rotational force of the coil spring 34) before the sliding door is fully opened. This is due to the following reason. The surplus length absorption unit 14 basically only needs to take up the difference between the maximum and minimum extra lengths of the flexible tube 18, but only taking up the difference results in FIG. 13 (A). As shown, there is a possibility that the flexible tube 18 is loosened while the sliding door is fully opened, and interferes with the vehicle body side component 10 such as the Rr fender. If the positional relationship between the stoppers 72 and 74 is set so that tension is applied to the flexible tube 18 before the sliding door is fully opened, the slack of the flexible tube 18 is reduced while the sliding door is fully opened. It is possible to avoid the flexible tube 18 from interfering with the vehicle body side component 10 such as the Rr fender.

  Next, FIG. 14 to FIG. 16 show countermeasures against foreign matters that may enter the surplus length absorption unit 14. When the surplus length absorption unit 14 is installed in the vicinity of a place where it is stepped on by a person getting on and off the car, there is a possibility that foreign matter such as pebbles may fall on the entrance of the flexible tube. In addition, when it is raining, when the slide door is opened, rainwater or muddy water splashed by another vehicle may fall on the entrance / exit of the flexible tube. Furthermore, when a drink etc. is spilled in the car, it may be possible that it hits the entrance of the flexible tube. In such a case, if pebbles or water enters the case of the extra length absorption unit and bites the pebbles or accumulates water, the quality of the extra length absorption unit may be deteriorated. In order to prevent this, the following measures should be taken.

  As shown in FIG. 14, the first countermeasure is to provide a notch 76 at the bottom of the flexible tube inlet / outlet 28 of the case 30 so as to prevent foreign matter such as pebbles from accumulating. In this way, foreign matter spills out from the notch 76, so that foreign matter can be less likely to enter the case 30 when the flexible tube enters and exits.

  As a second countermeasure, as shown in FIGS. 15A and 15B, a gap S larger than the size of foreign matter that can enter the case 30 is provided between the case 30 and the rotating drum 32. In this way, even if a foreign matter enters the case 30, the foreign matter is not caught between the case 30 and the rotating drum 32, and the rotation of the rotating drum 32 is not hindered. Specifically, a gap S of about 2 mm may be provided between the case 30 and the rotating drum 32. In the experiment, two kinds of pebbles of 2 mm to 6 mm and pebbles of 2 mm or less were dropped from the upper entrance of the flexible tube, and then the flexible tube was drawn out and wound up 50 times. As a result, it was found that pebbles of 2 mm to 6 mm were repelled by the flexible tube and did not collect at the entrance, and pebbles of 2 mm or less rarely entered the case. For this reason, the pebbles of 2 mm or less are likely to enter the case. Therefore, if a gap S of about 2 mm is provided between the case 30 and the rotating drum 32, no foreign matter is caught between the case 30 and the rotating drum 32, and the rotation of the rotating drum 32 is not hindered.

  As shown in FIGS. 16A and 16B, the third countermeasure is to incline the bottom 78 of the lower case 30A so that foreign matter that has entered the case 30 is discharged, and to form a hole 80. That is. In this way, foreign substances and water that have entered the case 30 can be discharged to the outside.

  As shown in FIG. 16A, the fourth countermeasure is to form a rib 82 in the coil spring accommodating portion of the lower case 30A so that the coil spring 34 is lifted from the bottom of the lower case 30A. In this way, water can be discharged more reliably, and there is less possibility of slight remaining water droplets adhering to the coil spring 34, so that the quality of the coil spring 34 can be kept stable.

  Next, FIG. 17 shows countermeasures against abnormal noise that may occur in the surplus length absorption unit. The end of the flexible tube 18 on the vehicle body side is fixed to the rotary drum 32 by a fixing component 46 (see FIG. 6), and the end on the door side is fixed to the door side fixing unit 16 (see FIG. 2). Although it is not shaken up and down, the intermediate part of the flexible tube 18 is shaken up and down by vibration generated when the vehicle is driven or by the insertion and removal of the flexible tube 18 from the extra length absorption unit 14 by opening and closing the slide door. there is a possibility. At this time, it is conceivable that a portion of the intermediate portion of the flexible tube housed in the case 30 hits the case 30, particularly the upper case 30 </ b> B (see FIG. 4), and noise is generated. As countermeasures, as shown in FIGS. 17A and 17B, the vertical movement of the flexible tube 18 wound around the rotating drum 32 is restricted from the upper edge of the rotating drum 32 to the outside. It is preferable to provide an overhanging piece 84 to be used. In this way, the flexible tube 18 does not hit the case 30 and the generation of abnormal noise can be prevented.

  Next, FIG. 18 shows a preferred form of the sub-cover 48. The sub cover 48 fixes the inner peripheral portion of the flat cable 20 wound in a spiral shape in the rotary drum 32 to the center portion of the case 30. The sub cover 48 is a main shaft 42 of the lower case 30A. A fitting convex portion 86 that fits into the upper end hole portion, and a hook-shaped guide passage 49 that guides the flat cable to the outside of the case 30 across the rotating drum 32. The outer end of the guide passage 49 is The lower case 30 </ b> A is fixed to the outer peripheral portion by a lock portion 88.

  In this way, there is no risk of contact with the flexible tube 18 or the spiral flat cable 20 in the path where the flat cable 20 is led out from the center of the case 30, and there is no concern about biting. The quality of the surplus length absorption unit 14 can be improved. Further, when assembling the surplus length absorption unit 14, by using the sub-cover 48, it is possible to assemble the components by stacking them upward from the lower part in order, so that the assemblability is greatly improved and more stable. It is possible to provide a power supply device for a sliding door of the quality. Moreover, since the power supply device for the sliding door can be operated when the assembly up to the sub cover 48 is completed, an operation check can be performed during the assembly, and a malfunction can be found after the upper case is attached. The sex can be very low.

  Further, the upper case 30B is formed with a groove-shaped lid portion 50 into which the upper surface portion (including the guide passage 49) of the sub cover 48 is fitted (see FIG. 6). If such a groove-shaped lid 50 is formed, the deformation of the sub-cover 48 does not occur during operation, so that contact between the lower portion of the sub-cover 48 (particularly the lower surface of the guide passage 49) and the rotary drum 32 can be prevented. , Excess length absorption can be performed smoothly.

  Next, FIG. 19 shows a preferred form of the rotating drum 32. The rotating drum 32 is formed by forming an opening 90 at a portion where the end of the coil spring 34 of the bottom plate portion 38 abuts. If such an opening 90 is formed, after the coil spring 34 is set at a predetermined position of the lower case 30A so that the lower end portion of the coil spring 34 is fitted into the spring end support portion of the lower case 30A, the rotary drum 32 is moved. When assembling, the upper end portion 34a of the coil spring 34 can be fitted into the spring end support portion of the rotary drum 32 while looking at the upper end portion 34a of the coil spring 34 from the opening 90, so that the assembly of the rotary drum 32 can be performed easily and efficiently. It can be carried out.

  Next, FIG. 20 shows a preferred form of the rotary drum 32, the lower case 30A, and the coil spring 34. When the rotary drum 32, the lower case 30A, and the coil spring 34 are assembled, as shown in FIG. 20 (A), the upper surface of the rotation angle regulating stopper 74 (see FIG. 11) provided on the lower case 30A and the upper surface of the rotary drum 32 are rotated. When the lower surface of the rotation angle restricting stopper 72 (same) provided on the drum 32 is brought into contact with the lower end, the upper end of the coil spring 34 is located above the lower end edge 92a of the spring accommodating portion 92 of the rotary drum 32, In addition, the dimension (Q) from the upper end of the coil spring 34 to the spring accommodating portion upper end surface 92b of the rotary drum 32 is formed to be larger than the dimension (R) from the upper end of the coil spring 34 to the spring accommodating portion lower end edge 92a of the rotating drum 32. Has been.

  In this way, after the coil spring 34 is set at a predetermined position of the lower case 30A, when the rotary drum 32 is assembled, the coil spring 34 is easily and reliably engaged only by setting the rotary drum 32 at a predetermined position. You can stop.

  The rotating drum 32, the lower case 30A, and the coil spring 34 are combined with an untwisted coil spring 34 and a lower case 30A so that the two do not rotate relatively (the lower end of the coil spring 34 is the spring of the lower case 30A). And the untwisted coil spring 34 and the rotating drum 32 are combined so that they do not rotate relative to each other (the upper end of the coil spring 34 is fitted into the spring supporting portion of the rotating drum 32). 20A, the lower surface of the rotation angle restricting stopper 72 provided on the rotating drum 32 is in contact with the upper surface of the rotation angle restricting stopper 74 provided on the lower case 30A. The rotating drum 32 is rotated by a predetermined angle in the direction in which the coil spring 34 is twisted to lower the lower case 30A. Pushed into, as shown in FIG. (B), a stopper 74 of the lower case 30A side and the rotary drum 32 side of the stopper 72 is formed to engage one another.

  In this way, the rotating drum 32 can be set at a predetermined position with no load applied to the coil spring 34, and then the rotating drum 32 is simply rotated and pushed toward the lower case 30A. Can be assembled. In addition, parts are hardly damaged during assembly, and the quality can be further stabilized.

Embodiment 2 FIG. 21 shows another embodiment of the present invention. This sliding door power supply device is different from that of the first embodiment in that the door side fixing unit 16 is fixed to the sliding door 12 so that the flexible tube 18 goes out of the sliding door. In this case, if the fixing position of the surplus length absorption unit 14 to the vehicle body 10 is the same as that of the first embodiment, the flexible tube from the flexible tube entrance / exit 28 of the surplus length absorption unit 14 to the door side fixing unit 16 is used. Contrary to the first embodiment, the route 18 is slightly longer when the slide door 12 is fully closed than when the slide door 12 is fully open. Therefore, the winding length (extra length) of the flexible tube 18 by the rotating drum 32 is short when the slide door 12 is fully closed, and is long when the slide door 12 is fully open.

  Since the configuration other than the above is the same as that of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted. Even with such a configuration, the same effects as those of the first embodiment can be obtained.

Embodiment 3 FIGS. 22 to 25 show still another embodiment of the present invention. This sliding door power supply device is different from that of the first embodiment in that the door side fixing unit 16 is attached to a fixing member 54 fixed to the sliding door 12 and to the fixing member 54 so as to be able to swing in the lateral direction. And the tube end clamp 56. The tube end clamp 56 grips the end of the flexible tube 18.

  The fixing member 54 is configured by coupling an upper part 54A and a lower part 54B as shown in FIG. The fixing member 54 has support plates 58A and 58B that are vertically opposed to each other, and a shaft hole 60 is formed in both the support plates 58A and 58B. The tube end clamp 56 is configured by coupling an upper clamp 56A and a lower clamp 56B. The tube end clamp 56 has a pair of upper and lower arms 62A and 62B extending toward the fixing member 54, and shaft pins 64 project from the upper surface of the upper arm 62A and the lower surface of the lower arm 62B, respectively. By inserting the shaft pin 64 into the shaft hole 60 of the fixing member 54, the tube end clamp 56 can swing in the lateral direction with respect to the fixing member 54. The fixing member 54 is formed with a swing regulating portion 66 that regulates the swing range of the tube end clamp 56. In addition, a guide groove 68 for leading the flat cable 20 into the slide door 12 is formed in the fixing member 54 (see FIG. 25).

  When such a door side fixing unit 16 is used, the flexible tube 18 is not bent at the mouth of the door side fixing unit 16 when the slide door 12 is fully opened or fully closed. It becomes difficult to stick.

  Since the configuration other than the above is the same as that of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted. Even with such a configuration, the same effects as those of the first embodiment can be obtained.

The perspective view which shows roughly the whole structure of the electric power feeder for sliding doors which concerns on this invention. The top view which shows one Embodiment of the electric power feeder for sliding doors which concerns on this invention together in the state at the time of sliding doors fully closed and fully opened. The top view which shows the locus | trajectory of the bending | flexion movement of a flexible tube from the time of sliding door full closure to the time of full opening of the electric power feeder for sliding doors of FIG. The perspective view of the upper surface side of the surplus length absorption unit used for the electric power feeder for sliding doors of FIG. The perspective view of a lower surface side similarly. Similarly disassembled perspective view. Similarly sectional drawing. The preferable form of a flexible tube is shown, (A) is a perspective view, (B) is a front view. The perspective view which shows the preferable form of the flexible tube entrance / exit of a case. 2A is a plan view showing an internal state when the slide door is fully closed, and FIG. 2B is an internal state when the slide door is fully closed. Plan view. The perspective view which shows the opposing surface of the lower case of a surplus length absorption unit, and a rotating drum. The top view which shows the rotation angle of a rotating drum, and the surplus length absorption length of a flexible tube. (A) is explanatory drawing when the tension | tensile_strength of a flexible tube at the time of a sliding door full open is weak, (B) is explanatory drawing when tension | tensile_strength is applied to a flexible pipe before the sliding door fully opens. The perspective view which shows the state which provided the notch part in the bottom part of the flexible tube entrance / exit of a case. The gap between a lower case and a rotating drum is shown, (A) is sectional drawing which shows the clearance gap of an axial direction, (B) is a BB sectional drawing of (A) which shows the clearance gap of radial direction. FIG. 4A is a cross-sectional view and FIG. 5B is a bottom view showing a structure for discharging foreign matter that has entered a case. The abnormal noise prevention measures of a surplus length absorption unit are shown, (A) is a perspective view, (B) is a top view. The preferable form of a sub cover is shown, (A) is a perspective view, (B) is sectional drawing. The perspective view which shows the preferable form of a rotating drum. The preferred form of a rotating drum, a lower case, and a coil spring is shown, (A) is sectional drawing in the middle of an assembly, (B) is sectional drawing after an assembly. The top view which shows other one Embodiment of the electric power feeder for slide doors which concerns on this invention with the locus | trajectory of the bending | flexion movement of a flexible tube from the time of a slide door being fully closed to the time of a full open. The top view which shows another one Embodiment of the electric power feeder for slide doors which concerns on this invention with the locus | trajectory of the bending | flexion movement of a flexible tube from the time of a slide door being fully closed to the time of a full open. The perspective view of the door side fixing unit used for the electric power feeder for sliding doors of FIG. Similarly disassembled perspective view. Similarly horizontal sectional view.

Explanation of symbols

10: Car body 12: Slide door 14: Extra length absorption unit 16: Door side fixing unit 18: Flexible tube 20: Flat cable (wire harness)
26: Guide 28: Entrance / exit 30: Case 32: Rotating drum 33: Rib 34: Coil spring 40: Hollow shaft portion 42: Main shaft 44: Center tube portion 46: Fixed part 48: Sub cover 52: Guide 53: Reinforcing wall 54: Fixed Member 56: Tube end clamp 64: Shaft pin 66: Swing restricting portion 72: Stopper 74 on the rotating drum 32 side: Stopper 76 on the lower case 30A side: Notch portion 80: Hole 82: Rib 84: Overhang piece 90: Opening Part

Claims (16)

A surplus length absorption unit fixed to the vehicle body side, a door side fixing unit fixed to the slide door side, a flexible pipe extending from the surplus length absorption unit to the door side fixing unit, the surplus length absorption unit, and flexibility A wire harness that passes from the vehicle body side to the sliding door side through the pipe and door side fixing unit, and
The surplus length absorption unit applies a rotational force in a direction in which the flexible tube is wound up to the case having a flexible tube entrance and exit, a rotating drum that winds up the flexible tube in the case, and the rotating drum. A torsion spring, and an end of the flexible tube on the vehicle body side is fixed to the rotating drum, and a portion of the wire harness on the vehicle body side is fixed to the rotating drum near the end of the flexible tube, It is wound spirally inside the rotating drum, the spiral inner periphery is fixed to the center of the case, and is drawn out of the case from there.
The door-side fixing unit is configured to grip an end portion of the flexible tube on the slide door side, and a portion of the wire harness on the slide door side is pulled out from the end portion of the flexible tube into the slide door. And
The surplus length absorption unit is fixed to the vehicle body so as to be located in the middle of the range of movement of the door side fixing unit by opening and closing of the slide door, and the flexible tube extending from the surplus length absorption unit to the door side fixing unit has the rotation Tension is applied by the rotational force of the drum ,
The wire harness is composed of one or a plurality of flat cables, and the flexible tube is composed of a corrugated tube having a vertically long cross section for accommodating the flat cable with its width direction facing up and down .
A power supply device for a sliding door characterized by the above. The power supply apparatus for a sliding door according to claim 1, wherein a rib extending in the longitudinal direction is formed on at least one of an upper surface and a lower surface of the corrugated tube having a vertically long cross section. The power supply device for a sliding door according to claim 1 Symbol placement, the entrance of the flexible tube of the extra-length absorbing unit, and wherein the guide for restricting a bend radius of the flexible tube in the allowable range is provided Power supply device for sliding door. The power supply device for a sliding door according to claim 3 , wherein a reinforcing wall for preventing the bending of the guide is provided on the back side of the guide that regulates the bending radius of the flexible tube within an allowable range. Power supply device for sliding doors. The power supply device for a sliding door according to any one of claims 1 to 4, the door side fixing unit, a flexible tube is fixed to the slide door so as exits forward or backward in the sliding door, and variable A power supply device for a sliding door, characterized in that a guide for restricting the bending radius of the flexible tube to an allowable range is provided near the outlet of the flexible tube. The power supply device for a sliding door according to any one of claims 1 to 4 , wherein the door-side fixing unit is fixed to the sliding door and attached to the fixing member so as to be able to swing in the lateral direction. A sliding door power supply device comprising a tube end clamp, wherein the fixing member is provided with a swing regulating portion for regulating a swing range of the tube end clamp. The power supply device for a sliding door according to any one of claims 1 to 6 , wherein the extra length absorbing unit case includes a lower case, an upper case, and an inner periphery of a spirally wound wire harness. The lower case is formed with a main shaft that is inserted into the hollow shaft portion of the rotating drum, and the upper case has a central tube portion that is located on the outer periphery of the hollow shaft portion of the rotating drum. The sub cover is formed so as not to rotate in the central cylindrical portion, and the torsion spring of the surplus length absorption unit is constituted by a coil spring, and the coil spring rotates in the direction of winding the flexible tube around the rotating drum. A power supply apparatus for a sliding door, wherein the power supply apparatus is incorporated between the lower case and the rotating drum while being twisted so as to apply a force. The power supply device for a sliding door according to any one of claims 1 to 6 , wherein the extra length absorbing unit case includes a lower case, an upper case, and an inner periphery of a spirally wound wire harness. The lower case is formed with a main shaft that is inserted into the hollow shaft portion of the rotary drum, and the sub cover is attached to the main shaft so as not to rotate. The torsion spring of the unit is composed of a coil spring, and this coil spring is incorporated between the lower case and the rotating drum in a state of being twisted so as to apply a rotating force in the direction of winding the flexible tube to the rotating drum. A power supply device for a sliding door, characterized by comprising: The power supply device for a sliding door according to claim 7 or 8, wherein a stopper for regulating a rotation angle of the rotating drum is provided on a lower surface of the bottom plate portion of the rotating drum and an upper surface of the bottom plate portion of the lower case facing the rotating drum. A power supply device for a sliding door, characterized in that The power supply device for a sliding door according to claim 7 or 8, wherein a bottom portion of the flexible tube entrance / exit of the case is provided with a notch so that foreign matter such as pebbles does not collect, and between the case and the rotating drum. There is a gap larger than the size of the foreign matter that can enter the case, and the bottom of the lower case is inclined and formed with a hole so that the foreign matter entered in the case is discharged, and the lower case is formed. A sliding door power supply apparatus, wherein a rib is formed in a coil spring accommodating portion of the case so that the coil spring is lifted from a bottom portion of the lower case. 9. The sliding door power supply device according to claim 7 or 8, further comprising an overhanging piece for regulating the vertical movement of the flexible tube wound around the rotating drum from the upper edge of the rotating drum toward the outside. A power supply device for a sliding door, characterized in that 9. The power supply device for a sliding door according to claim 8 , wherein the sub cover has a fitting portion that fits to an upper end of the main shaft of the lower case, and a guide passage that guides the flat cable to the outside of the case across the rotating drum. And the outer end of this guide passage is fixed to the outer peripheral part of a lower case, The electric power feeder for sliding doors characterized by the above-mentioned. 13. The slide door power supply apparatus according to claim 12, wherein a groove-shaped lid portion into which the upper surface portion of the sub cover is fitted is formed in the upper case. 9. The slide door power supply device according to claim 7 or 8 , wherein an opening is formed in a portion of the bottom plate portion of the rotating drum where the end of the coil spring contacts. The power supply device for a sliding door according to claim 9 , wherein when the rotary drum, the lower case, and the coil spring are assembled, the upper surface of the rotation angle regulating stopper provided on the lower case and the rotation angle provided on the rotary drum. Dimension from the upper end of the coil spring to the upper end surface of the spring drum of the rotating drum and from the upper end of the coil spring to the upper end surface of the spring drum when the upper end of the coil spring is positioned above the lower edge of the spring drum (Q) is formed so that it may become larger than the dimension (R) from a coil spring upper end to the lower end edge of the spring accommodating part of a rotating drum, The electric power feeder for sliding doors characterized by the above-mentioned. 16. The power supply device for a sliding door according to claim 15 , wherein the rotating drum, the lower case, and the coil spring are combined and twisted so that the coil spring and the lower case that are not twisted are not relatively rotated. If the coil spring and the rotating drum are combined so that they do not rotate relative to each other, the lower surface of the rotation angle restricting stopper provided on the rotating drum is placed on the upper surface of the rotation angle restricting stopper provided on the lower case. From this state, the rotating drum is rotated by a predetermined angle in the direction of applying a twist to the coil spring, and when pushed into the lower case, the stopper on the lower case and the stopper on the rotating drum are engaged with each other. A power supply device for a sliding door, characterized in that

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